Fast Neutrons Shielding Properties for HAP-Fe2O3 Composite Materials

The production technology of reinforcement filler for new multifunctional polymer based composites with weft-knitted structure had been proposed. In such reinforcement filler high-strength carbon fibers (CFs) from PAN precursors (wefts) were laid in a knitted fabric as straight continuous yarns, so in such case these CFs were not twisted by knitting machine to form the loops. Various kinds of chemical and inorganic fibers can be used as base yarn in this case, in particular glass, aramid, carbon fibers from hydrate cellulose and etc. Properties of multifunctional polymer-based composite materials with weft-knitted fillers depend upon fiber composition, relative content of weft and base yarns, scheme filler stacking (1D, 2D and 3D composites). The electrical conductivity of weft-knitted fabrics shows the strong anisotropy along high-strength fibers in comparison with looped rows, depending on the direction of high-strength CFs (weft). Investigation of shielding properties of polymer based composites reinforced by carbon weft-knitted fabrics showed the possibility of using them as shielding materials with the ability to absorb electromagnetic radiation.

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Investigation of fast neutron shielding properties of new polyurethane-based composites loaded with B4C, BeO, WO3, ZnO, and Gd2O3 micro-and nanoparticles

Polish Journal of Medical Physics and Engineering ◽

10.2478/pjmpe-2019-0028 ◽

2019 ◽

Vol 25 (4) ◽

pp. 211-219 ◽

Cited By ~ 1

Author(s):

Asghar Mesbahi ◽

Khatibeh Verdipoor ◽

Farhad Zolfagharpour ◽

Abdolali Alemi

Keyword(s):

Cross Section ◽

Cross Sections ◽

Neutron Cross Section ◽

Radiation Shielding ◽

Fast Neutrons ◽

Nano Composites ◽

Monte Carlo Code ◽

Neutron Shielding ◽

Shielding Properties ◽

Polyurethane Matrix

Abstract The aim of the current research was to study the radiation shielding properties of polyurethane-based shielding materials filled with B4C, BeO, WO3, ZnO, and Gd2O3 particles against fast neutrons. The macroscopic cross sections of composites containing micro- and nanoparticles with a diameter of 10 µm and 50 nm were calculated using MCNPX (2.6.0) Monte Carlo code. The results showed that adding nano-scaled fillers to polyurethane matrix increases attenuation properties of neutron shields compared to micro-scaled fillers for intermediate and fast neutrons. Among the studied composites, WO3 and Gd2O3 nano-composites presented higher neutron cross section compared to others.

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A Closer Look on Nuclear Radiation Shielding Properties of Eu3+ Doped Heavy Metal Oxide Glasses: Impact of Al2O3/PbO Substitution

Materials ◽

10.3390/ma14185334 ◽

2021 ◽

Vol 14 (18) ◽

pp. 5334

Author(s):

Ghada ALMisned ◽

Huseyin O. Tekin ◽

Antoaneta Ene ◽

Shams A. M. Issa ◽

Gokhan Kilic ◽

...

Keyword(s):

Heavy Metal ◽

Metal Oxide ◽

Maximum Level ◽

Radiation Shielding ◽

Nuclear Radiation ◽

Fast Neutrons ◽

Nominal Composition ◽

Oxide Glasses ◽

Wide Range ◽

Shielding Properties

In this study, a group of heavy metal oxide glasses with a nominal composition of 55B2O3 + 19.5TeO2 + 10K2O + (15−x) PbO + xAl2O3 + 0.5Eu2O3 (where x = 0, 2.5, 5, 7.5, 10, 12.5, and 15 in wt.%) were investigated in terms of their nuclear radiation shielding properties. These glasses containing lanthanide-doped heavy metal oxide were envisioned to yield valuable results in respect to radiation shielding, and thus a detailed investigation was carried out; the obtained results were compared with traditional and new generation shields. Advanced simulation and theoretical methods have been utilized in a wide range of energy regions. Our results showed that the AL0.0 sample with the highest PbO contribution had superior shielding properties in the entire energy range. The effective removal of cross-sections for fast neutrons (ΣR) was also examined. The results indicated that AL5.0 had the greatest value. While increasing the concentration of Al2O3 in samples had a negative effect on the radiation shielding characteristics, it can be concluded that using PbO in the Eu3+ doped heavy metal oxide glasses could be a useful tool to keep gamma-ray shielding properties at a maximum level.

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Calculation of Shielding Parameters of Fast Neutrons for Some Composite Materials

Al-Mustansiriyah Journal of Science ◽

10.23851/mjs.v30i1.520 ◽

2019 ◽

Vol 30 (1) ◽

pp. 210

Author(s):

Ahmed Fadhil Mkhaiber ◽

Salwah Kareem Dawood

Keyword(s):

Composite Materials ◽

Free Path ◽

Polymer Composite ◽

Cross Section ◽

Mean Free Path ◽

Basic Material ◽

Fast Neutrons ◽

Removal Cross Section ◽

Half Thickness ◽

Reinforced Materials

In this paper ,Shielding parameters of fast neutrons like removal cross section , half thickness , and mean free path were calculated for polymer composite whish consisted of paraffin wax as basic material (P) with various reinforced materials (B, B2O3, Fe2O3, W, Clay) with different reinforced concentration (5, 15, 25, 35, 45) % . Results have been shown that , with increasing the reinforced materials concentrations , removal cross section increases while half thickness and mean free path decreased.

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Measurement of the shielding properties of composite materials: comparison of the dual TEM and noncontact probe methods

IEEE Transactions on Electromagnetic Compatibility ◽

10.1109/15.736223 ◽

1998 ◽

Vol 40 (4) ◽

pp. 364-369 ◽

Cited By ~ 11

Author(s):

C.L. Gardner ◽

Y.F.C. Poissant

Keyword(s):

Composite Materials ◽

Shielding Properties

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Composite materials combining acoustic and radio shielding properties

«Aviation Materials and Technologies» ◽

10.18577/2071-9140-2016-0-4-60-67 ◽

2016 ◽

pp. 60-67 ◽

Cited By ~ 2

Author(s):

I.D. Kraev ◽

◽

E.M. Shuldeshov ◽

M.M. Platonov ◽

G.Yu. Yurkov ◽

...

Keyword(s):

Composite Materials ◽

Shielding Properties

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Nondestructive Evaluation of Metallic Fillers Embedded in Polyester Matrix

Materiale Plastice ◽

10.37358/mp.18.3.5039 ◽

2018 ◽

Vol 55 (3) ◽

pp. 410-413

Author(s):

Rozina Steigmann ◽

Adriana Savin ◽

Nicoleta Iftimie

Keyword(s):

Composite Materials ◽

Dielectric Permittivity ◽

Nondestructive Evaluation ◽

Efficient Method ◽

Point Of View ◽

Average Amplitude ◽

Polyester Matrix ◽

Shielding Properties ◽

Aisi 316

Composites made from metallic fillers embedded in polymer matrix have good shielding properties as electrical point of view and tribology properties from mechanical point of view. These properties depend on amounts, shapes, sizes, and combinations of fillers and matrix. This paper proposes an electromagnetic method for determination of metallic fillers concentration in composite materials from metallic fillers embedded in polyester matrix. The bulk resistivity and dielectric permittivity were measured but these measurements are less influenced by the fillers concentration. The amplitude measurement of e.m.f induced in the reception coil of the focalized electromagnetic transducer and their averaging for the scanning of a relative large zone of the composite has proven to be an efficient method. The average amplitude linearly decreases with the increasing of fillers concentration, and has different values for Cu and AISI 316 fillers.

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Fast Neutron and Gamma-Ray Attenuation Properties of Some HMO Tellurite-Tungstate-Antimonate Glasses: Impact of Sm3+ Ions

Applied Sciences ◽

10.3390/app112110168 ◽

2021 ◽

Vol 11 (21) ◽

pp. 10168

Author(s):

Ghada ALMisned ◽

Huseyin O. Tekin ◽

Hesham M. H. Zakaly ◽

Shams A. M. Issa ◽

Gokhan Kilic ◽

...

Keyword(s):

Cross Section ◽

Radiation Shielding ◽

Fast Neutrons ◽

Monte Carlo Code ◽

Attenuation Coefficients ◽

Effective Removal ◽

Removal Cross Section ◽

Mass Attenuation Coefficients ◽

Shielding Properties ◽

Mass Attenuation

Characteristics of tellurite-tungstate-antimonate glasses containing heavy metal oxide were investigated in detail using two methods: the MCNPX Monte Carlo code and the Phy-X/PSD platform. The influence of Sm2O3, translocating with TeO2 at ratios of 0.2, 0.5, 0.8, 1, and 1.5 mol% on radiation shielding properties of glasses, was set forth with five glass structures determined according to the (75-x)TeO2-15Sb2O3-10WO3-xSm2O3 glass composition. Densities of the glasses were prepared by doping a low ratio of Sm2O3 that varied between 5.834 and 5.898 g/cm3. Sample densities, which have an important role in determining radiation shielding character, increased depending on the increase in Sm2O3 concentration. Effective removal cross-section (∑R) values against fast neutrons, as well as linear and mass attenuation coefficients, half-value layer, mean free path, variation of effective atomic number against photon energy, exposure, and energy built-up factors, were simulated with the help of these two methods. As a result of these estimates, it can be concluded that values obtained using both methods are consistent with each other. From the obtained values, it can be concluded that the SM1.5 sample containing 1.5 mol% would have the most efficient role in radiation shielding. An increase of Sm2O3 resulted in a significant increase in linear and mass attenuation coefficients and effective removal cross-section values belonging to fast neutrons and, in addition, resulted in a decrease in the half value layer. Doping HMO glasses with Sm2O3 was observed to contribute directly to the development of radiation shielding properties of the glass.

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